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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /image/decoders/nsJPEGDecoder.h | |
parent | Initial commit. (diff) | |
download | firefox-upstream/124.0.1.tar.xz firefox-upstream/124.0.1.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | image/decoders/nsJPEGDecoder.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/image/decoders/nsJPEGDecoder.h b/image/decoders/nsJPEGDecoder.h new file mode 100644 index 0000000000..fa010f9677 --- /dev/null +++ b/image/decoders/nsJPEGDecoder.h @@ -0,0 +1,113 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_image_decoders_nsJPEGDecoder_h +#define mozilla_image_decoders_nsJPEGDecoder_h + +#include "RasterImage.h" +#include "SurfacePipe.h" +#include "EXIF.h" + +// On Windows systems, RasterImage.h brings in 'windows.h', which defines INT32. +// But the jpeg decoder has its own definition of INT32. To avoid build issues, +// we need to undefine the version from 'windows.h'. +#undef INT32 + +#include "Decoder.h" + +extern "C" { +#include "jpeglib.h" +} + +#include <setjmp.h> + +namespace mozilla::image { + +typedef struct { + struct jpeg_error_mgr pub; // "public" fields for IJG library + jmp_buf setjmp_buffer; // For handling catastropic errors +} decoder_error_mgr; + +typedef enum { + JPEG_HEADER, // Reading JFIF headers + JPEG_START_DECOMPRESS, + JPEG_DECOMPRESS_PROGRESSIVE, // Output progressive pixels + JPEG_DECOMPRESS_SEQUENTIAL, // Output sequential pixels + JPEG_DONE, + JPEG_SINK_NON_JPEG_TRAILER, // Some image files have a + // non-JPEG trailer + JPEG_ERROR +} jstate; + +class RasterImage; +struct Orientation; + +class nsJPEGDecoder : public Decoder { + public: + virtual ~nsJPEGDecoder(); + + DecoderType GetType() const override { return DecoderType::JPEG; } + + void NotifyDone(); + + protected: + nsresult InitInternal() override; + LexerResult DoDecode(SourceBufferIterator& aIterator, + IResumable* aOnResume) override; + nsresult FinishInternal() override; + + Maybe<Telemetry::HistogramID> SpeedHistogram() const override; + + protected: + EXIFData ReadExifData() const; + WriteState OutputScanlines(); + + private: + friend class DecoderFactory; + + // Decoders should only be instantiated via DecoderFactory. + nsJPEGDecoder(RasterImage* aImage, Decoder::DecodeStyle aDecodeStyle); + + enum class State { JPEG_DATA, FINISHED_JPEG_DATA }; + + void FinishRow(uint32_t aLastSourceRow); + LexerTransition<State> ReadJPEGData(const char* aData, size_t aLength); + LexerTransition<State> FinishedJPEGData(); + + StreamingLexer<State> mLexer; + + public: + struct jpeg_decompress_struct mInfo; + struct jpeg_source_mgr mSourceMgr; + struct jpeg_progress_mgr mProgressMgr; + decoder_error_mgr mErr; + jstate mState; + + uint32_t mBytesToSkip; + + const JOCTET* mSegment; // The current segment we are decoding from + uint32_t mSegmentLen; // amount of data in mSegment + + JOCTET* mBackBuffer; + uint32_t mBackBufferLen; // Offset of end of active backtrack data + uint32_t mBackBufferSize; // size in bytes what mBackBuffer was created with + uint32_t mBackBufferUnreadLen; // amount of data currently in mBackBuffer + + JOCTET* mProfile; + uint32_t mProfileLength; + + uint32_t* mCMSLine; + + bool mReading; + + const Decoder::DecodeStyle mDecodeStyle; + + SurfacePipe mPipe; +}; + +} // namespace mozilla::image + +#endif // mozilla_image_decoders_nsJPEGDecoder_h |